We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Tunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocomposite.
- Authors
Lin, Aigu L.; Rodrigues, J. N. B.; Su, Chenliang; Milletari, M.; Loh, Kian Ping; Wu, Tom; Chen, Wei; Neto, A. H. Castro; Adam, Shaffique; Wee, Andrew T. S.
- Abstract
Magnetic materials have found wide application ranging from electronics and memories to medicine. Essential to these advances is the control of the magnetic order. To date, most room-temperature applications have a fixed magnetic moment whose orientation is manipulated for functionality. Here we demonstrate an iron-oxide and graphene oxide nanocomposite based device that acts as a tunable ferromagnet at room temperature. Not only can we tune its transition temperature in a wide range of temperatures around room temperature, but the magnetization can also be tuned from zero to 0.011 A m2/kg through an initialization process with two readily accessible knobs (magnetic field and electric current), after which the system retains its magnetic properties semi-permanently until the next initialization process. We construct a theoretical model to illustrate that this tunability originates from an indirect exchange interaction mediated by spin-imbalanced electrons inside the nanocomposite.
- Subjects
FERROMAGNETIC materials; FERRIC oxide; GRAPHENE oxide; MAGNETIZATION; NANOCOMPOSITE materials
- Publication
Scientific Reports, 2015, p11430
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep11430